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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: pres_curses.c,v 1.2 1999/06/24 15:51:16 mdw Exp $ |
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4 | * |
5 | * Curses-based output presentation |
6 | * |
7 | * (c) 1999 EBI |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of sw-tools. |
13 | * |
14 | * sw-tools is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * sw-tools is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with sw-tools; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
29 | /*----- Revision history --------------------------------------------------* |
30 | * |
31 | * $Log: pres_curses.c,v $ |
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32 | * Revision 1.2 1999/06/24 15:51:16 mdw |
33 | * Fix signal handlers so they don't corrupt `errno'. |
34 | * |
35 | * Revision 1.1.1.1 1999/06/02 16:53:35 mdw |
36 | * Initial import. |
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37 | * |
38 | */ |
39 | |
40 | /*----- Header files ------------------------------------------------------*/ |
41 | |
42 | #include "config.h" |
43 | #ifdef HAVE_CURSES |
44 | |
45 | #include <errno.h> |
46 | #include <signal.h> |
47 | #include <stdio.h> |
48 | #include <stdlib.h> |
49 | #include <string.h> |
50 | |
51 | #include <sys/types.h> |
52 | #include <unistd.h> |
53 | |
54 | #if defined(HAVE_NCURSES_H) |
55 | # include <ncurses.h> |
56 | #elif defined(HAVE_NCURSES_NCURSES_H) |
57 | # include <ncurses/ncurses.h> |
58 | #elif defined(HAVE_CURSES_H) |
59 | # include <curses.h> |
60 | #else |
61 | # error "Where's your <curses.h> header?" |
62 | #endif |
63 | #include <term.h> |
64 | |
65 | #include <mLib/alloc.h> |
66 | #include <mLib/report.h> |
67 | |
68 | #include "sw.h" |
69 | #include "sw_arch.h" |
70 | #include "pres_curses.h" |
71 | |
72 | #ifndef SIGWINCH |
73 | # undef HAVE_WRESIZE |
74 | #endif |
75 | |
76 | /*----- Data structures ---------------------------------------------------*/ |
77 | |
78 | typedef struct cwin { |
79 | struct cwin *next; |
80 | WINDOW *w; |
81 | int top; |
82 | int height; |
83 | WINDOW *s; |
84 | archent *e; |
85 | } cwin; |
86 | |
87 | /*----- Static variables --------------------------------------------------*/ |
88 | |
89 | static cwin *cwins = 0; |
90 | static int nwins = 0; |
91 | |
92 | /*----- Main code ---------------------------------------------------------*/ |
93 | |
94 | /* --- @sizes@ --- * |
95 | * |
96 | * Arguments: --- |
97 | * |
98 | * Returns: --- |
99 | * |
100 | * Use: Calculates window sizes for all the windows. The heights are |
101 | * determined in a way which doesn't allow rounding errors to be |
102 | * an issue (although there will be up to a line's height |
103 | * difference between two windows). No actual changing of |
104 | * curses structures is done. |
105 | */ |
106 | |
107 | static void sizes(void) |
108 | { |
109 | cwin *c; |
110 | int t = 0, h = LINES, w = nwins; |
111 | |
112 | for (c = cwins; c; c = c->next) { |
113 | int a = h / w; |
114 | c->top = t; |
115 | c->height = a - 1; |
116 | t += a; |
117 | h -= a; |
118 | w--; |
119 | } |
120 | } |
121 | |
122 | /* --- @sig_tstp@ --- */ |
123 | |
124 | #ifdef SIGTSTP |
125 | static void sig_tstp(int s) |
126 | { |
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127 | int e = errno; |
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128 | endwin(); |
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129 | errno = e; |
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130 | raise(SIGSTOP); |
131 | } |
132 | #endif |
133 | |
134 | /* --- @sig_cont@ --- */ |
135 | |
136 | #ifdef SIGTSTP |
137 | static void sig_cont(int s) |
138 | { |
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139 | int e = errno; |
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140 | wrefresh(curscr); |
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141 | errno = e; |
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142 | } |
143 | #endif |
144 | |
145 | /* --- @sig_winch@ --- */ |
146 | |
147 | #ifdef HAVE_WRESIZE |
148 | |
149 | static void sig_winch(int s) |
150 | { |
151 | cwin *c; |
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152 | int e = errno; |
153 | |
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154 | endwin(); |
155 | refresh(); |
156 | sizes(); |
157 | for (c = cwins; c; c = c->next) { |
158 | mvwin(c->w, c->top, 0); |
159 | wresize(c->w, c->height, COLS); |
160 | mvwin(c->s, c->top + c->height, 0); |
161 | wnoutrefresh(c->w); |
162 | wnoutrefresh(c->s); |
163 | } |
164 | doupdate(); |
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165 | errno = e; |
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166 | } |
167 | |
168 | #endif |
169 | |
170 | /* --- @curses_ok@ --- */ |
171 | |
172 | int curses_ok(void) |
173 | { |
174 | if (!isatty(STDOUT_FILENO)) { |
175 | moan("can't use curses: stdout isn't a terminal"); |
176 | return (0); |
177 | } |
178 | if (setupterm(0, STDOUT_FILENO, 0) == ERR) { |
179 | moan("can't use curses: couldn't read terminfo"); |
180 | return (0); |
181 | } |
182 | if (!tigetstr("cup")) { |
183 | moan("can't use curses: terminal insufficiently winning"); |
184 | return (0); |
185 | } |
186 | return (1); |
187 | } |
188 | |
189 | /* --- @curses_init@ --- */ |
190 | |
191 | int curses_init(archcons *a) |
192 | { |
193 | cwin **cc = &cwins, *c; |
194 | |
195 | /* --- Allocate my window structures --- */ |
196 | |
197 | nwins = 0; |
198 | for (; a; a = a->cdr) { |
199 | archent *e = a->car; |
200 | if (!e->r) |
201 | continue; |
202 | c = xmalloc(sizeof(cwin)); |
203 | e->pres = c; |
204 | c->w = 0; |
205 | c->e = e; |
206 | nwins++; |
207 | *cc = c; |
208 | cc = &c->next; |
209 | } |
210 | *cc = 0; |
211 | |
212 | /* --- Haul curses up by its naughty bits --- */ |
213 | |
214 | initscr(); |
215 | keypad(stdscr, TRUE); |
216 | cbreak(); |
217 | noecho(); |
218 | nonl(); |
219 | def_prog_mode(); |
220 | |
221 | /* --- Grind through everything setting up windows --- */ |
222 | |
223 | sizes(); |
224 | for (c = cwins; c; c = c->next) { |
225 | if ((c->w = newwin(c->height, COLS, c->top, 0)) == 0 || |
226 | (c->s = newwin(1, COLS, c->top + c->height, 0)) == 0) |
227 | goto fail_0; |
228 | scrollok(c->w, TRUE); |
229 | leaveok(c->w, TRUE); |
230 | leaveok(c->s, TRUE); |
231 | wbkgdset(c->s, A_STANDOUT); |
232 | werase(c->s); |
233 | mvwprintw(c->s, 0, 0, " %s [running]\n", c->e->arch); |
234 | wnoutrefresh(c->w); |
235 | wnoutrefresh(c->s); |
236 | } |
237 | doupdate(); |
238 | |
239 | #ifdef HAVE_WRESIZE |
240 | signal(SIGWINCH, sig_winch); |
241 | #endif |
242 | #ifdef SIGTSTP |
243 | signal(SIGTSTP, sig_tstp); |
244 | signal(SIGCONT, sig_cont); |
245 | #endif |
246 | return (0); |
247 | |
248 | fail_0: |
249 | c = cwins; |
250 | while (c) { |
251 | cwin *cc = c->next; |
252 | if (c->w) |
253 | delwin(c->w); |
254 | if (c->s) |
255 | delwin(c->s); |
256 | free(c); |
257 | c = cc; |
258 | } |
259 | endwin(); |
260 | return (-1); |
261 | } |
262 | |
263 | /* --- @curses_output@ --- */ |
264 | |
265 | void curses_output(archent *e, const char *p, size_t sz) |
266 | { |
267 | cwin *c = e->pres; |
268 | while (sz) { |
269 | waddch(c->w, *p); |
270 | p++; |
271 | sz--; |
272 | } |
273 | wrefresh(c->w); |
274 | } |
275 | |
276 | /* --- @curses_close@ --- */ |
277 | |
278 | void curses_close(archent *e, int ok) |
279 | { |
280 | cwin *c = e->pres; |
281 | mvwprintw(c->s, 0, 0, " %s [%s]\n", e->arch, ok ? "finished" : "failed"); |
282 | wrefresh(c->s); |
283 | } |
284 | |
285 | /* --- @curses_done@ --- */ |
286 | |
287 | void curses_done(archcons *a) |
288 | { |
289 | if (opt_flags & optFlag_beep) { |
290 | beep(); |
291 | doupdate(); |
292 | } |
293 | wgetch(cwins->w); |
294 | cwins = 0; |
295 | for (; a; a = a->cdr) { |
296 | archent *e = a->car; |
297 | cwin *c = e->pres; |
298 | delwin(c->w); |
299 | delwin(c->s); |
300 | free(c); |
301 | } |
302 | curses_abort(0); |
303 | } |
304 | |
305 | /* --- @curses_abort@ --- */ |
306 | |
307 | void curses_abort(archcons *a) |
308 | { |
309 | #ifdef HAVE_WRESIZE |
310 | signal(SIGWINCH, SIG_DFL); |
311 | #endif |
312 | #ifdef SIGTSTP |
313 | signal(SIGTSTP, SIG_DFL); |
314 | signal(SIGCONT, SIG_DFL); |
315 | #endif |
316 | endwin(); |
317 | } |
318 | |
319 | /*----- That's all, folks -------------------------------------------------*/ |
320 | |
321 | #else |
322 | int pres_curses__built = 1; |
323 | #endif |